fix libpagemap for x86_64

libpagemap was storing a virtual pfn in an int, which works on arm64
with 39 bits of virtual address space but fails on x86_64.  Use an
unsigned long instead.

Fixes errors when running procrank on x86_64:
warning: could not read usage for 1

Change-Id: I171c8ee49faa51accf3c1bb69059d549aee04979

1 files changed, 1 insertions, 1 deletions

diff --git a/libpagemap/pm_process.c b/libpagemap/pm_process.c
index dcc9a554..e68263c6 100644
--- a/libpagemap/pm_process.c
+++ b/libpagemap/pm_process.c
@@ -102,7 +102,7 @@ int pm_process_usage(pm_process_t *proc, pm_memusage_t *usage_out) {
 int pm_process_pagemap_range(pm_process_t *proc,
                              unsigned long low, unsigned long high,
                              uint64_t **range_out, size_t *len) {
-    int firstpage, numpages;
+    unsigned long firstpage, numpages;
     uint64_t *range;
     off_t off;
     int error;